Andrew Posselt, MD, PhD
Professor
Surgery
School of Medicine

In addition to caring for patients, Posselt conducts research on pancreatic islet cell transplantation, a procedure that can allow people with type 1 diabetes to discontinue insulin therapy. He also investigates mechanisms by which a transplant recipient's body rejects or tolerates tissue from a donor who isn't genetically identical, and he studies the metabolic and biochemical consequences of bariatric surgery.

Posselt earned his medical degree and a doctorate in immunology from the University of Pennsylvania. He completed residencies in internal medicine and general surgery as well as a transplant fellowship at UCSF, before joining the staff in 2003.

Posselt is a member of several professional and honorary societies, and has given presentations on transplant issues related to patient care and research. At UCSF, he supervises residents and fellows in transplant services and general surgery.

• Prebiotic to Improve Calcium Absorption in Postmenopausal Women After Gastric Bypass: A Randomized Controlled Trial.
  The Journal of clinical endocrinology and metabolism 2022 Wu KC, Cao S, Weaver CM, King NJ, Patel S, Kingman H, Sellmeyer DE, McCauley K, Li D, Lynch SV, Kim TY, Black DM, Shafer MM, Özçam M, Lin DL, Rogers SJ, Stewart L, Carter JT, Posselt AM, Schafer AL
• Islets Transplantation at a Crossroads - Need for Urgent Regulatory Update in the United States: Perspective Presented During the Scientific Sessions 2021 at the American Diabetes Association Congress.
  Frontiers in endocrinology 2022 Witkowski P, Philipson LH, Buse JB, Robertson RP, Alejandro R, Bellin MD, Kandeel F, Baidal D, Gaglia JL, Posselt AM, Anteby R, Bachul PJ, Al-Salmay Y, Jayant K, Perez-Gutierrez A, Barth RN, Fung JJ, …
• Advantages and Limitations of Clinical Scores for Donation After Circulatory Death Liver Transplantation.
  Frontiers in surgery 2022 Meier RPH, Kelly Y, Yamaguchi S, Braun HJ, Lunow-Luke T, Adelmann D, Niemann C, Maluf DG, Dietch ZC, Stock PG, Kang SM, Feng S, Posselt AM, Gardner JM, Syed SM, Hirose R, Freise CE, Ascher NL, Roberts…
• Surgical approach and short-term outcomes in adults and children undergoing total pancreatectomy with islet autotransplantation: A report from the Prospective Observational Study of TPIAT.
  Pancreatology : official journal of the International Association of Pancreatology (IAP) ... [et al.] 2021 Nathan JD, Yang Y, Eaton A, Witkowski P, Wijkstrom M, Walsh M, Trikudanathan G, Singh VK, Schwarzenberg SJ, Pruett TL, Posselt A, Naziruddin B, Mokshagundam SP, Morgan K, Lara LF, Kirchner V, He J, …
• Bariatric surgery prior to transplantation and risk of early hospital re-admission, graft failure, or death following kidney transplantation.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2021 Ku E, McCulloch CE, Roll GR, Posselt A, Grimes BA, Johansen KL
• The Association of Smoking and Alcohol Abuse on Anxiety and Depression in Patients With Recurrent Acute or Chronic Pancreatitis Undergoing Total Pancreatectomy and Islet Autotransplantation: A Report From the Prospective Observational Study of TPIAT Cohort.
  Pancreas 2021 Lara LF, Wastvedt S, Hodges JS, Witkowski P, Wijkstrom M, Walsh RM, Singh VK, Schwarzenberg SJ, Pruett TL, Posselt A, Naziruddin B, Nathan JD, Morgan KA, Mitchell R, Kirchner VA, Mokshagundam SL, …
• Arguments against the Requirement of a Biological License Application for Human Pancreatic Islets: The Position Statement of the Islets for US Collaborative Presented during the FDA Advisory Committee Meeting.
  Journal of clinical medicine 2021 Witkowski P, Odorico J, Pyda J, Anteby R, Stratta RJ, Schrope BA, Hardy MA, Buse J, Leventhal JR, Cui W, Hussein S, Niederhaus S, Gaglia J, Desai CS, Wijkstrom M, Kandeel F, Bachul PJ, Becker YT, Wang…
• Targeting CXCR1/2 in the first multicenter, double-blinded, randomized trial in autologous islet transplant recipients.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2021 Witkowski P, Wijkstrom M, Bachul PJ, Morgan KA, Levy M, Onaca N, Chaidarun SS, Gardner T, Shapiro AMJ, Posselt A, Ahmad SA, Daffonchio L, Ruffini PA, Bellin MD
• Sleeve gastrectomy prior to liver transplantation is superior to medical weight loss in reducing posttransplant metabolic complications.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2021 Sharpton SR, Terrault NA, Tavakol MM, Posselt AM
• Anticoagulation practices in total pancreatectomy with autologous islet cell transplant patients: an international survey of clinical programs.
  Transplant international : official journal of the European Society for Organ Transplantation 2021 Desai CS, Szempruch KR, Vonderau JS, Chetboun M, Pattou F, Coates T, De Paep DL, Hawthorne WJ, Khan KM, de Koning EJP, Naziruddin B, Posselt A, Schrope BA, Wijkstrom M, Witkowski P, Shapiro AMJ
• Circulating miRNA in Patients Undergoing Total Pancreatectomy and Islet Autotransplantation.
  Cell transplantation 2021 Vasu S, Yang JM, Hodges J, Abu-El-Haija MA, Adams DB, Balamurugan AN, Beilman GJ, Chinnakotla S, Conwell DL, Freeman ML, Gardner TB, Hatipoglu B, Kirchner V, Lara LF, Morgan KA, Nathan JD, Posselt A, …
• Preoperative ERCP has no impact on islet yield following total pancreatectomy and islet autotransplantation (TPIAT): Results from the Prospective Observational Study of TPIAT (POST) cohort.
  Pancreatology : official journal of the International Association of Pancreatology (IAP) ... [et al.] 2020 Trikudanathan G, Elmunzer BJ, Yang Y, Abu-El-Haija M, Adams D, Ahmad S, Balamurugan AN, Beilman GJ, Chinnakotla S, Conwell DL, Freeman ML, Gardner TB, Hatipoglu B, Hodges JS, Kirchner V, Lara LF, Long…
• COVID-19 and Abdominal Transplant: A Stepwise Approach to Practice During Pandemic Conditions.
  Transplantation 2020 Syed SM, Gardner J, Roll G, Webber A, Mehta N, Shoji J, Adelmann D, Niemann C, Braun HJ, Mello A, Yao F, Posselt A, Kang SM, Hirose R, Roberts J, Feng S, Ascher N, Stock P, Freise C
• Phase 3 trial of human islet-after-kidney transplantation in type 1 diabetes.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2020 Markmann JF, Rickels MR, Eggerman TL, Bridges ND, Lafontant DE, Qidwai J, Foster E, Clarke WR, Kamoun M, Alejandro R, Bellin MD, Chaloner K, Czarniecki CW, Goldstein JS, Hering BJ, Hunsicker LG, …
• Ampullary stenosis and choledocholithiasis post Roux-En-Y gastric bypass: challenges of biliary access and intervention.
  HPB : the official journal of the International Hepato Pancreato Biliary Association 2020 Wisneski AD, Carter J, Nakakura EK, Posselt A, Rogers SJ, Cello JP, Arain M, Kirkwood KS, Hirose K, Stewart L, Corvera CU
• Long-term follow-up of beta cell replacement therapy in 10 HIV-infected patients with renal failure secondary to type 1 diabetes mellitus.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2020 Roll GR, Posselt AM, Freise J, Baird J, Syed S, Mo Kang S, Hirose R, Szot GL, Zarinsefat A, Feng S, Worner G, Sarwal M, Stock PG
• Obesity, transplantation, and bariatric surgery: An evolving solution for a growing epidemic.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2020 Diwan TS, Lee TC, Nagai S, Benedetti E, Posselt A, Bumgardner G, Noria S, Whitson BA, Ratner L, Mason D, Friedman J, Woodside KJ, Heimbach J
• Increases in PYY and uncoupling of bone turnover are associated with loss of bone mass after gastric bypass surgery.
  Bone 2019 Kim TY, Shoback DM, Black DM, Rogers SJ, Stewart L, Carter JT, Posselt AM, King NJ, Schafer AL
• A Study on the Effect of Patient Characteristics, Geographical Utilization, and Patient Outcomes for Total Pancreatectomy Alone and Total Pancreatectomy With Islet Autotransplantation in Patients With Pancreatitis in the United States.
  Pancreas 2019 Lara LF, Bellin MD, Ugbarugba E, Nathan JD, Witkowski P, Wijkstrom M, Steel JL, Smith KD, Singh VK, Schwarzenberg SJ, Pruett TL, Naziruddin B, Long-Simpson L, Kirchner VA, Gardner TB, Freeman ML, Dunn…
• Outcomes of Sleeve Gastrectomy in Obese Liver Transplant Candidates.
  Liver transplantation : official publication of the American Association for the Study of Liver Diseases and the International Liver Transplantation Society 2019 Sharpton SR, Terrault NA, Posselt AM
• Changes in Lean Mass, Absolute and Relative Muscle Strength, and Physical Performance After Gastric Bypass Surgery.
  The Journal of clinical endocrinology and metabolism 2019 Alba DL, Wu L, Cawthon PM, Mulligan K, Lang T, Patel S, King NJ, Carter JT, Rogers SJ, Posselt AM, Stewart L, Shoback DM, Schafer AL
• Oxygen Perfusion (Persufflation) of Human Pancreata Enhances Insulin Secretion and Attenuates Islet Proinflammatory Signaling.
  Transplantation 2019 Kelly AC, Smith KE, Purvis WG, Min CG, Weber CS, Cooksey AM, Hasilo C, Paraskevas S, Suszynski TM, Weegman BP, Anderson MJ, Camacho LE, Harland RC, Loudovaris T, Jandova J, Molano DS, Price ND, …
• Effects of Gastric Bypass Surgery on Bone Mass and Microarchitecture Occur Early and Particularly Impact Postmenopausal Women.
  Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research 2018 Schafer AL, Kazakia GJ, Vittinghoff E, Stewart L, Rogers SJ, Kim TY, Carter JT, Posselt AM, Pasco C, Shoback DM, Black DM
• Splenic Vein Thrombosis Following Pancreas Transplantation: Identification of Factors That Support Conservative Management.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2017 Harbell JW, Morgan T, Feldstein VA, Roll GR, Posselt A, Kang SM, Feng S, Hirose R, Freise CE, Stock P
• Bone Marrow Fat Changes After Gastric Bypass Surgery Are Associated With Loss of Bone Mass.
  Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research 2017 Kim TY, Schwartz AV, Li X, Xu K, Black DM, Petrenko DM, Stewart L, Rogers SJ, Posselt AM, Carter JT, Shoback DM, Schafer AL
• Erratum. National Institutes of Health-Sponsored Clinical Islet Transplantation Consortium Phase 3 Trial: Manufacture of a Complex Cellular Product at Eight Processing Facilities. Diabetes 2016;65:3418-3428.
  Diabetes 2017 Ricordi C, Goldstein JS, Balamurugan AN, Szot GL, Kin T, Liu C, Czarniecki CW, Barbaro B, Bridges ND, Cano J, Clarke WR, Eggerman TL, Hunsicker LG, Kaufman DB, Khan A, Lafontant DE, Linetsky E, Luo X,…
• Correction: An intravascular bioartificial pancreas device (iBAP) with silicon nanopore membranes (SNM) for islet encapsulation under convective mass transport.
  Lab on a chip 2017 Song S, Blaha C, Moses W, Park J, Wright N, Groszek J, Fissell W, Vartanian S, Posselt AM, Roy S
• Pancreas-After-Islet Transplantation in Nonuremic Type 1 Diabetes: A Strategy for Restoring Durable Insulin Independence.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2017 Wisel SA, Gardner JM, Roll GR, Harbell J, Freise CE, Feng S, Kang SM, Hirose R, Kaufman DB, Posselt AM, Stock PG
• Purified Human Pancreatic Islets, CIT Culture Media with Lisofylline or Exenatide.
  CellR4-- repair, replacement, regeneration, & reprogramming 2017 NIH CIT Consortium Chemistry Manufacturing Controls Monitoring Committee, Ansite J, Balamurugan AN, Barbaro B, Battle J, Brandhorst D, Cano J, Chen X, Deng S, Feddersen D, Friberg A, Gilmore T, …
• An intravascular bioartificial pancreas device (iBAP) with silicon nanopore membranes (SNM) for islet encapsulation under convective mass transport.
  Lab on a chip 2017 Song S, Blaha C, Moses W, Park J, Wright N, Groszek J, Fissell W, Vartanian S, Posselt AM, Roy S
• Glucose-Stimulated Insulin Response of Silicon Nanopore-Immunoprotected Islets under Convective Transport.
  ACS biomaterials science & engineering 2017 Song S, Yeung R, Park J, Posselt AM, Desai TA, Tang Q, Roy S
• A Single Perioperative Injection of Dexamethasone Decreases Nausea, Vomiting, and Pain after Laparoscopic Donor Nephrectomy.
  Journal of transplantation 2017 Yamanaga S, Posselt AM, Freise CE, Kobayashi T, Tavakol M, Kang SM
• National Institutes of Health-Sponsored Clinical Islet Transplantation Consortium Phase 3 Trial: Manufacture of a Complex Cellular Product at Eight Processing Facilities.
  Diabetes 2016 Ricordi C, Goldstein JS, Balamurugan AN, Szot GL, Kin T, Liu C, Czarniecki CW, Barbaro B, Bridges ND, Cano J, Clarke WR, Eggerman TL, Hunsicker LG, Kaufman DB, Khan A, Lafontant DE, Linetsky E, Luo X,…
• Abnormalities in biomarkers of mineral and bone metabolism in kidney donors.
  Kidney international 2016 Kasiske BL, Kumar R, Kimmel PL, Pesavento TE, Kalil RS, Kraus ES, Rabb H, Posselt AM, Anderson-Haag TL, Steffes MW, Israni AK, Snyder JJ, Singh RJ, Weir MR
• Phase 3 Trial of Transplantation of Human Islets in Type 1 Diabetes Complicated by Severe Hypoglycemia.
  Diabetes care 2016 Hering BJ, Clarke WR, Bridges ND, Eggerman TL, Alejandro R, Bellin MD, Chaloner K, Czarniecki CW, Goldstein JS, Hunsicker LG, Kaufman DB, Korsgren O, Larsen CP, Luo X, Markmann JF, Naji A, Oberholzer …
• Silicon nanopore membrane (SNM) for islet encapsulation and immunoisolation under convective transport.
  Scientific reports 2016 Song S, Faleo G, Yeung R, Kant R, Posselt AM, Desai TA, Tang Q, Roy S
• Effect of Immigration Status on Outcomes in Pediatric Kidney Transplant Recipients.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2016 McEnhill ME, Brennan JL, Winnicki E, Lee MM, Tavakol M, Posselt AM, Stock PG, Portale AA
• A Multicenter Study: North American Islet Donor Score in Donor Pancreas Selection for Human Islet Isolation for Transplantation.
  Cell transplantation 2016 Wang LJ, Kin T, O'Gorman D, Shapiro AMJ, Naziruddin B, Takita M, Levy MF, Posselt AM, Szot GL, Savari O, Barbaro B, McGarrigle J, Yeh CC, Oberholzer J, Lei J, Chen T, Lian M, Markmann JF, Alvarez A, …
• Under Utilization of Pancreas Transplants in Cystic Fibrosis Recipients in the United Network Organ Sharing (UNOS) Data 1987-2014.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2016 Usatin DJ, Perito ER, Posselt AM, Rosenthal P
• A Comparative Analysis of the Safety, Efficacy, and Cost of Islet Versus Pancreas Transplantation in Nonuremic Patients With Type 1 Diabetes.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2015 Moassesfar S, Masharani U, Frassetto LA, Szot GL, Tavakol M, Stock PG, Posselt AM
• Expanded indications for bariatric surgery: should patients on chronic steroids be offered bariatric procedures?
  Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery 2015 Kaplan JA, Schecter SC, Rogers SJ, Lin MYC, Posselt AM, Carter JT
• Intestinal Calcium Absorption Decreases Dramatically After Gastric Bypass Surgery Despite Optimization of Vitamin D Status.
  Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research 2015 Schafer AL, Weaver CM, Black DM, Wheeler AL, Chang H, Szefc GV, Stewart L, Rogers SJ, Carter JT, Posselt AM, Shoback DM, Sellmeyer DE
• Autologous islet transplantation with remote islet isolation after pancreas resection for chronic pancreatitis.
  JAMA surgery 2015 Tai DS, Shen N, Szot GL, Posselt A, Feduska NJ, Habashy A, Clerkin B, Core E, Busuttil RW, Hines OJ, Reber HA, Lipshutz GS
• Changes in vertebral bone marrow fat and bone mass after gastric bypass surgery: A pilot study.
  Bone 2015 Schafer AL, Li X, Schwartz AV, Tufts LS, Wheeler AL, Grunfeld C, Stewart L, Rogers SJ, Carter JT, Posselt AM, Black DM, Shoback DM
• Islet transplantation for Type 1 diabetes: where are we now?
  Expert review of clinical immunology 2014 Ahearn AJ, Parekh JR, Posselt AM
• Islet product characteristics and factors related to successful human islet transplantation from the Collaborative Islet Transplant Registry (CITR) 1999-2010.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2014 Balamurugan AN, Naziruddin B, Lockridge A, Tiwari M, Loganathan G, Takita M, Matsumoto S, Papas K, Trieger M, Rainis H, Kin T, Kay TW, Wease S, Messinger S, Ricordi C, Alejandro R, Markmann J, Kerr-…
• Human islet viability and function is maintained during high-density shipment in silicone rubber membrane vessels.
  Transplantation proceedings 2014 Kitzmann JP, Pepper AR, Gala-Lopez B, Pawlick R, Kin T, O'Gorman D, Mueller KR, Gruessner AC, Avgoustiniatos ES, Karatzas T, Szot GL, Posselt AM, Stock PG, Wilson JR, Shapiro AM, Papas KK
• Predictors of hospital stay following laparoscopic gastric bypass: analysis of 9,593 patients from the National Surgical Quality Improvement Program.
  Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery 2014 Carter J, Elliott S, Kaplan J, Lin M, Posselt A, Rogers S
• Combined pancreatic islet and kidney transplantation in a child with unstable type 1 diabetes and end-stage renal disease.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2013 Benedict KA, Moassesfar S, Adi S, Gitelman SE, Brennan JL, McEnhill M, Stock PG, Portale AA, Posselt AM
• Laparoscopic sleeve gastrectomy is safe and efficacious for pretransplant candidates.
  Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery 2013 Lin MY, Tavakol MM, Sarin A, Amirkiai SM, Rogers SJ, Carter JT, Posselt AM
• Improvement in outcomes of clinical islet transplantation: 1999-2010.
  Diabetes care 2012 Barton FB, Rickels MR, Alejandro R, Hering BJ, Wease S, Naziruddin B, Oberholzer J, Odorico JS, Garfinkel MR, Levy M, Pattou F, Berney T, Secchi A, Messinger S, Senior PA, Maffi P, Posselt A, Stock PG…
• Safety and feasibility of sleeve gastrectomy in morbidly obese patients following liver transplantation.
  Surgical endoscopy 2012 Lin MY, Tavakol MM, Sarin A, Amirkiai SM, Rogers SJ, Carter JT, Posselt AM
• Islet Transplantation & β-Cell Replacement Therapies for Diabetes.
  Journal of transplantation 2012 Berney T, Korsgren O, Posselt A, Pileggi A
• Experience with laparoscopic donor nephrectomy among more than 1000 cases: low complication rates, despite more challenging cases.
  Archives of surgery (Chicago, Ill. : 1960) 2011 Ahearn AJ, Posselt AM, Kang SM, Roberts JP, Freise CE
• Early and late abdominal bleeding after Roux-en-Y gastric bypass: sources and tailored therapeutic strategies.
  Obesity surgery 2011 Rabl C, Peeva S, Prado K, James AW, Rogers SJ, Posselt A, Campos GM
• Islet transplantation in type 1 diabetic patients using calcineurin inhibitor-free immunosuppressive protocols based on T-cell adhesion or costimulation blockade.
  Transplantation 2010 Posselt AM, Szot GL, Frassetto LA, Masharani U, Tavakol M, Amin R, McElroy J, Ramos MD, Kerlan RK, Fong L, Vincenti F, Bluestone JA, Stock PG
• Islet transplantation in type 1 diabetics using an immunosuppressive protocol based on the anti-LFA-1 antibody efalizumab.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2010 Posselt AM, Bellin MD, Tavakol M, Szot GL, Frassetto LA, Masharani U, Kerlan RK, Fong L, Vincenti FG, Hering BJ, Bluestone JA, Stock PG
• Clinical islet transplantation at the University of California, San Francisco.
  Clinical transplants 2010 Posselt AM, Szot GL, Frassetto LA, Masharani U, Stock PG
• Successful clinical islet isolation using a GMP-manufactured collagenase and neutral protease.
  Transplantation 2009 Szot GL, Lee MR, Tavakol MM, Lang J, Dekovic F, Kerlan RK, Stock PG, Posselt AM
• Portomesenteric venous thrombosis after laparoscopic surgery: a systematic literature review.
  Archives of surgery (Chicago, Ill. : 1960) 2009 James AW, Rabl C, Westphalen AC, Fogarty PF, Posselt AM, Campos GM
• Long-term renal function and cardiovascular disease risk in obese kidney donors.
  Clinical journal of the American Society of Nephrology : CJASN 2009 Tavakol MM, Vincenti FG, Assadi H, Frederick MJ, Tomlanovich SJ, Roberts JP, Posselt AM
• Factors associated with weight loss after gastric bypass.
  Archives of surgery (Chicago, Ill. : 1960) 2008 Campos GM, Rabl C, Mulligan K, Posselt A, Rogers SJ, Westphalen AC, Lin F, Vittinghoff E
• A clinical scoring system for predicting nonalcoholic steatohepatitis in morbidly obese patients.
  Hepatology (Baltimore, Md.) 2008 Campos GM, Bambha K, Vittinghoff E, Rabl C, Posselt AM, Ciovica R, Tiwari U, Ferrel L, Pabst M, Bass NM, Merriman RB
• Laparoscopic bariatric surgery improves candidacy in morbidly obese patients awaiting transplantation.
  Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery 2008 Takata MC, Campos GM, Ciovica R, Rabl C, Rogers SJ, Cello JP, Ascher NL, Posselt AM
• Human albumin preserves islet mass and function better than whole serum during pretransplantation islet culture.
  Transplantation proceedings 2008 Lee RH, Carter J, Szot GL, Posselt A, Stock P
• The impact of roux limb length on weight loss after gastric bypass.
  Obesity surgery 2007 Ciovica R, Takata M, Vittinghoff E, Lin F, Posselt AM, Rabl C, Stein HJ, Campos GM
• Catheter-directed therapy for DVT after pancreas transplantation.
  Clinical transplantation 2007 Mahanty HD, Posselt AM, Lipshutz GS, Schneider DB, Freise CE
• Spectrum and risk factors of complications after gastric bypass.
  Archives of surgery (Chicago, Ill. : 1960) 2007 Campos GM, Ciovica R, Rogers SJ, Posselt AM, Vittinghoff E, Takata M, Cello JP
• Predictors, treatment, and outcomes of gastrojejunostomy stricture after gastric bypass for morbid obesity.
  Obesity surgery 2007 Takata MC, Ciovica R, Cello JP, Posselt AM, Rogers SJ, Campos GM
• Routine upper GI series after gastric bypass does not reliably identify anastomotic leaks or predict stricture formation.
  Surgical endoscopy 2007 Carter JT, Tafreshian S, Campos GM, Tiwari U, Herbella F, Cello JP, Patti MG, Rogers SJ, Posselt AM
• Propylthiouracil-associated liver failure presenting as probable autoimmune hepatitis in a child with Graves' disease.
  Pediatric transplantation 2006 Sipe WE, Su M, Posselt A, Kim GE, Quiros JA, Rosenthal P
• Antibody-mediated rejection of a pancreas allograft.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2006 Melcher ML, Olson JL, Baxter-Lowe LA, Stock PG, Posselt AM
• Pretransplant islet culture: a comparison of four serum-free media using a murine model of islet transplantation.
  Transplantation proceedings 2005 Carter J, Karmiol S, Nagy M, McElreath R, Calloway C, Motley A, Neill A, Jang HJ, Posselt A, Stock P
• More than 500 consecutive laparoscopic donor nephrectomies without conversion or repeated surgery.
  Archives of surgery (Chicago, Ill. : 1960) 2005 Melcher ML, Carter JT, Posselt A, Duh QY, Stoller M, Freise CE, Kang SM
• Laparoscopic procurement of kidneys with multiple renal arteries is associated with increased ureteral complications in the recipient.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2005 Carter JT, Freise CE, McTaggart RA, Mahanty HD, Kang SM, Chan SH, Feng S, Roberts JP, Posselt AM
• BKV in simultaneous pancreas-kidney transplant recipients: a leading cause of renal graft loss in first 2 years post-transplant.
  American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons 2005 Lipshutz GS, Mahanty H, Feng S, Hirose R, Stock PG, Kang SM, Posselt AM, Freise CE
• Laparoscopic right donor nephrectomy: a large single-center experience.
  Transplantation 2004 Posselt AM, Mahanty H, Kang SM, Stoller ML, Meng MV, Roberts JP, Freise CE
• Experience with steroid-free maintenance immunosuppression in simultaneous pancreas-kidney transplantation.
  Transplantation proceedings 2004 Freise CE, Kang SM, Feng S, Posselt A, Hirose K, Hirose R, Stock P
• Congenital cleft spleen with CT scan appearance of high-grade splenic laceration after blunt abdominal trauma.
  The Journal of emergency medicine 2003 Brennan TV, Lipshutz GS, Posselt AM, Horn JK
• CD69 expression on peripheral CD8 T cells correlates with acute rejection in renal transplant recipients.
  Transplantation 2003 Posselt AM, Vincenti F, Bedolli M, Lantz M, Roberts JP, Hirose R
• Longevity of 2328 chairside Cerec inlays and onlays.
  International journal of computerized dentistry 2003 Posselt A, Kerschbaum T
• Intraportal delivery of immunosuppression to intrahepatic islet allograft recipients.
  Transplant international : official journal of the European Society for Organ Transplantation 1995 Wang X, Alfrey EJ, Posselt A, Tafra L, Alak AM, Dafoe DC
• Prolongation of survival of donor-strain islet xenografts (rat-->mouse) by intrathymic inoculation of xenogeneic islet and bone marrow cells.
  Transplantation 1994 Mayo GL, Posselt AM, Barker CF, Rostami S, Mayo SP, Campos L, Naji A
• Intrathymic transplantation promotes survival of islet xenografts (rat-->mouse).
  Transplantation proceedings 1994 Mayo GL, Posselt AM, Campos L, Noorchashm N, Barker CF, Naji A
• The failure of intrathymic transplantation of nonimmunogenic islet allografts to promote induction of donor-specific unresponsiveness.
  Transplantation 1994 Campos L, Posselt AM, Deli BC, Mayo GL, Pete K, Barker CF, Naji A
• Examination of the mechanisms responsible for tolerance induction after intrathymic inoculation of allogeneic bone marrow.
  Annals of surgery 1993 Odorico JS, O'Connor T, Campos L, Barker CF, Posselt AM, Naji A
• Promotion of rat cardiac allograft survival by intrathymic inoculation of donor splenocytes.
  Transplantation 1993 Odorico JS, Posselt AM, Naji A, Markmann JF, Barker CF
• Prolonged survival of rat orthotopic liver allografts after intrathymic inoculation of donor-strain cells.
  Transplantation 1993 Campos L, Alfrey EJ, Posselt AM, Odorico JS, Barker CF, Naji A
• Intrathymic inoculation of donor cells promotes survival of rat orthotopic liver allografts.
  Transplantation proceedings 1993 Campos L, Alfrey EJ, Posselt AM, Odorico JS, Naji A, Barker CF
• Intrathymic inoculation of islets at birth prevents autoimmune diabetes and pancreatic insulitis in the BB rat.
  Transplantation proceedings 1993 Posselt AM, Barker CF, Friedman AL, Koeberlein B, Tomaszewski JE, Naji A
• Prolonged survival of rat cardiac allografts after intrathymic inoculation of donor thymocytes.
  Transplantation proceedings 1993 Odorico JS, Barker CF, Markmann JF, Posselt AM, Naji A
• Intrathymic transplantation as a model for tolerance.
  Advances in nephrology from the Necker Hospital 1993 Barker CF, Posselt AM, Odorico JS, Markmann JF, Naji A
• Prolongation of rat pancreatic islet allograft survival by anti-CD2 monoclonal antibody treatment.
  Transplantation 1992 Roark JH, Posselt AM, Campos L, Kim J, Chavin KD, Bromberg JS, Barker CF, Naji A
• Pioneering work in immune tolerance.
  Science (New York, N.Y.) 1992 Naji A, Posselt AM, Barker CF
• Microchimerism of the thymus and graft acceptance.
  Lancet (London, England) 1992 Posselt AM, Naji A, Barker CF
• Induction of donor-specific tolerance to rat cardiac allografts by intrathymic inoculation of bone marrow.
  Surgery 1992 Odorico JS, Barker CF, Posselt AM, Naji A
• Promotion of pancreatic islet allograft survival by intrathymic transplantation of bone marrow.
  Diabetes 1992 Posselt AM, Odorico JS, Barker CF, Naji A
• Successful islet transplantation in the thymus of spontaneously diabetic BB rats.
  Transplantation proceedings 1992 Posselt AM, Barker CF, Markmann JF, Roark JH, Naji A
• Prevention of autoimmune diabetes in the BB rat by intrathymic islet transplantation at birth.
  Science (New York, N.Y.) 1992 Posselt AM, Barker CF, Friedman AL, Naji A
• Intraportal FK 506 improves intrahepatic islet allograft survival.
  Transplantation proceedings 1991 Wang X, Berezniak R, Tafra L, Posselt A, Barker CF, Dafoe DC
• Intrathymic islet transplantation in the spontaneously diabetic BB rat.
  Annals of surgery 1991 Posselt AM, Naji A, Roark JH, Markmann JF, Barker CF
• Major-histocompatibility-complex restricted and nonrestricted autoimmune effector mechanisms in BB rats.
  Transplantation 1991 Markmann JF, Posselt AM, Bassiri H, Brayman KL, Woehrle M, Hickey WF, Silvers WK, Barker CF, Naji A
• Studies of privileged sites and islet transplantation.
  Transplantation proceedings 1991 Barker CF, Markmann JF, Posselt AM, Naji A
• Selective T-cell depletion of recipients in allogeneic small bowel transplantation (SBT) in the rat.
  Transplantation proceedings 1991 Deaton DH, Posselt AM, Naji A, Barker CF
• Induction of donor-specific unresponsiveness by intrathymic islet transplantation.
  Science (New York, N.Y.) 1990 Posselt AM, Barker CF, Tomaszewski JE, Markmann JF, Choti MA, Naji A
• Immunologic consequences of islet MHC antigen modulation in autoimmune diabetes.
  Transplantation proceedings 1990 Markmann JF, Posselt AM, Levy M, Naji A, Barker CF
• The effect of islet cell culture in vitro at 24 degrees C on graft survival and MHC antigen expression.
  Transplantation 1990 Markmann JF, Tomaszewski J, Posselt AM, Levy MM, Woehrle M, Barker CF, Naji A
• Suppression of carbon monoxide excretion rate by tin protoporphyrin.
  American journal of diseases of children (1960) 1986 Posselt AM, Kwong LK, Vreman HJ, Stevenson DK
• Effect of tin protoporphyrin on the excretion rate of carbon monoxide in newborn rats after hematoma formation.
  Journal of pediatric gastroenterology and nutrition 1985 Posselt AM, Cowan BE, Kwong LK, Vreman HJ, Stevenson DK